Backstop



FIG. 1 is a perspective view;

FIG. 2 is a front elevation;

FIG. 3 is a rear elevation;

FIG. 4 is a top view;

FIG. 5 is a bottom view;

FIG. 6 is a left side elevation; and,

FIG. 7 is a right side elevation. 

The ornamental design for a backstop, as described and shown. 